Surface blend

[Rj1]

Hi, I would like to join and blend these 4 surfaces in a smooth way, but I have tried command blend surface, match surface even patch command, I still cannot fix it. Any help please! The shape of surfaces at the end need to be remained, the surface at the middle can compromise a little bit. Please have a look at the rhino file, thanks!

surface blend.3dm (724.7 KB)

[encephalon]

take a look at this position

you created a surface that folds a bit back, very bad for getting good transitions.

at the following position

the corners are not touching.

[pascal (Pascal Golay)]

Hello - I’d look at making the three base surfaces all one surface.

-Pascal